Britney Spears' ex-husband Kevin Federline sat down with Access Hollywood to chat about his role on VH1â€™s Celebrity Fit Club: Boot Camp, and the former fattie reveals that depression played a big part in his overeating.

K-Fed told the show, "Once you get depressed, you donâ€™t really feel like doing anything. Youâ€™re kind of discouraged about yourself and then the weight gain too, or that makes me more depressed. I mean, itâ€™s a combination of all of those things.â€

Kevin admitted that his divorce from Britney in 2006 played a large part in his depression, and while he doesn't blame her entirely, he definitely seems to be using it as an excuse! â€œA number of things between, I mean, everybody knows what happened with me and Brit. Iâ€™m not going to say thatâ€™s the total cause of it but, I mean, just not being happy with myself was probably the main part of my depression,â€ he said.

So what's his relationship with Britney like now? â€œIâ€™m in the best possible scenario right now," Kevin says. "Iâ€™m really happy for her. Iâ€™m very happy for her.â€

Kevin definitely seems to be happier with fewer pounds on his frame, and he tells Access that being asked to join Celebrity Fit Club couldn't have come at a better time. â€œThey called me and they asked me if I wanted to do it and I had maybe 24 hours to decide because the show started taping the next day after that weekend,â€ he said. If you want to watch K-Fed shed the pounds, be sure to watch the show when it premieres on February 8, 2010!

Think K-Fed will bring 'em some good numbers? We're talking about Nielsen ratings, not the ones on the scale....